Linked Applications Launcher allows you to automatically launch, quit, or kill applications when others are launched or quit. You can make any application launch automatically when any other one launches or quits. You can make any application quit or even kill automatically when any other one launches or quits. You can add or remove as many links between applications as you want. It appears in the right side of the menu bar. It doesn't need any installation which makes it very easy to use. It is available in Dutch, English, French, German, Hungarian, Italian and many other languages.
InstantTranslate makes it really easy to translate a selection of text in the application you are working in from one language to another language.
One World Dictionary by Ascendo is a leading multilingual reference tool for Apple desktops.
VisualVM
